CN105322790B - DC-DC conversion circuit and electrical management chip package including the circuit - Google Patents

DC-DC conversion circuit and electrical management chip package including the circuit Download PDF

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Publication number
CN105322790B
CN105322790B CN201510454608.6A CN201510454608A CN105322790B CN 105322790 B CN105322790 B CN 105322790B CN 201510454608 A CN201510454608 A CN 201510454608A CN 105322790 B CN105322790 B CN 105322790B
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China
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voltage
output
value
control signal
current
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CN105322790A (en
Inventor
文诚佑
高命龙
琴东震
牟耿求
延平宇
千裕苏
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

A kind of direct current (DC)-DC conversion circuit includes: electric pressure converter, generates in response to driving signal and adjusts electric current, and generates output voltage and output electric current；Output voltage regulator adjusts output voltage and exports first control signal；The voltage value of first control signal is limited to less than threshold value by voltage limitator；Current sensor, sensing adjusts the intensity of electric current, and generates the second control signal with voltage value corresponding with the value of the intensity sensed；And drive signal generator, driving signal is generated based on first control signal and second control signal, first control signal has the voltage value lower than threshold value.

Description

DC-DC conversion circuit and electrical management chip package including the circuit
Cross reference to related applications
The 10-2014-0096656 South Korea submitted this application claims on July 29th, 2014 to Korean Intellectual Property Office The equity of patent application, it is open to be incorporated herein by reference in their entirety.
Technical field
Present inventive concept is related to converted electrical number, and more particularly, to for direct current (DC) signal to be converted into DC The circuit of signal and electrical management chip package including the circuit.
Background technique
Electronic circuit is played a role by electric signal.Electric signal can have various forms (for example, exchange (AC) or direct current And various characteristics (for example, voltage or electric current) (DC)).Some electronic circuits can be in the form or characteristic of converted electrical number.Example Such as, electric signal can be converted to DC form from AC form by some electronic circuits.Some electronic circuits can be by the electricity of electric signal Pressure characteristic is converted to current characteristics.
Particularly, switch regulator or linear regulator are used as DC-DC conversion circuit, by the telecommunications of DC form Number it is converted into the electric signal of DC form.For example, DC-DC conversion circuit can be by the voltage of the input electrical signal of DC form from one Voltage level conversion is to another voltage level.
Miniaturized electronics (for example, hand-held phone, plate etc.) may include multiple DC-DC conversion circuits.However, these The function of DC-DC conversion circuit may overlap with each other.For example, hand-held phone may both include for by the height from 5.5V to 25V Voltage is converted into the DC-DC conversion circuit of the low-voltage of about 5V, but include for will about 5V voltage at about 4.2V voltage DC-DC conversion circuit.In this example, the transfer characteristic of DC-DC conversion circuit is different from each other, but their function phase Seemingly.
Summary of the invention
The exemplary embodiment of present inventive concept can provide direct current (DC)-DC conversion circuit, comprising: electric pressure converter, It is configured as receiving input voltage, is generated in response to driving signal and adjust electric current, and generate output voltage and output electric current, it is defeated Electric current is generated based on adjusting electric current out；Output voltage regulator is configured as adjusting output voltage, and defeated by controlling Terminal exports first control signal out；Voltage limitator is configured as the voltage value of first control signal being limited to less than threshold Value；Current sensor is configured as the intensity that sensing adjusts electric current, and generates with corresponding with the value of the intensity sensed Voltage value second control signal；And drive signal generator, it is configured as based on first control signal and the second control Signal generates driving signal, and first control signal has the voltage value lower than threshold value.
When the voltage value of output voltage is equal to the voltage value adjusted by output voltage regulator or is greater than lowest critical value When, the voltage value of first control signal is equal to the voltage of control output end, and when the voltage value of output voltage is lower than by defeated Out voltage regulator adjust voltage value and be less than lowest critical value when, voltage limitator is configured as first control signal Voltage value be limited to less than threshold value.
Output voltage and output electric current correspond respectively to be used for the charging charged for the battery not being completely charged Voltage and charging current.
When the battery not being completely charged is connected to the node for being configured as output output voltage, voltage limitator quilt It is configured to the voltage value of first control signal being limited to less than threshold value.
Voltage limitator includes: operational amplifier comprising is configured as receiving the first input end of limitation reference voltage Son is configured as receiving the second input terminal of the voltage of control output end and is configured as output to limitation reference voltage The comparison output terminal for the result being compared with the voltage of control output end；And diode, the anode of diode are connected It is connected to the second input terminal, and the cathode of diode is connected to and compares output terminal.
It is adjustable for limiting the voltage value of reference voltage.
When the voltage value of the voltage of control output end is equal to or less than the voltage value of limitation reference voltage, the first control The voltage value of signal is equal to the voltage of control output end, and when the voltage value of the voltage of control output end is greater than limitation ginseng When examining the voltage value of voltage, voltage limitator is configured as the voltage value of first control signal being limited to less than threshold value.
The exemplary embodiment of present inventive concept can provide DC-DC conversion circuit, comprising: electric pressure converter is configured It to receive input voltage, is generated in response to driving signal and adjusts electric current, and export output voltage and output electric current, adjust electric current The of the second interval that the first current component and current value including current value increased first interval therebetween reduce therebetween Two current components, output electric current are generated based on adjusting electric current；Output voltage regulator is configured as adjusting output voltage, And generate first control signal；Voltage limitator is configured as the voltage value of first control signal being limited to less than threshold value； Current sensor is configured as the intensity that sensing adjusts electric current, and generates with corresponding with the value of the intensity sensed The second control signal of voltage value；Input current estimator is configured as coming by using first current component at the first interval Estimate the intensity of input current, input current is generated based on input voltage；And drive signal generator, it is configured as base Driving signal is generated in first control signal and second control signal, and first control signal has the voltage value lower than threshold value.
Electric pressure converter includes: the first transistor comprising is connected to the of the node for being configured as receiving input voltage One terminal, the first transistor are configured as controlling by including the first driving signal in driving signal；Second transistor, It is connected between the Second terminal of the first transistor and ground nodes, and is configured as by including in driving signal Second driving signal controls；The first terminal of inductance element, inductance element is connected to the Second terminal of the first transistor；And Capacity cell is connected between the node and ground nodes for being configured as output output voltage.
The first transistor and second transistor are successively switched on respectively responsive to the first driving signal and the second driving signal.
Adjusting electric current is the electric current for flowing through inductance element.
It is adjustable for being used to adjust for the voltage value of the adjusting reference voltage of output voltage.
The exemplary embodiment of present inventive concept can provide electrical management chip package, comprising: rectification circuit is configured It is rectification exchange (AC) voltage to generate rectified voltage；DC-DC conversion circuit is configured as receiving rectified voltage, And export output voltage and output electric current；And control circuit, it is configured as the behaviour of control rectification circuit and DC-DC conversion circuit Make.DC-DC conversion circuit may include: electric pressure converter, be configured as receiving rectified voltage, raw in response to driving signal At adjusting electric current, and output voltage and output electric current are generated, output electric current is generated based on adjusting electric current；Output voltage tune Device is saved, is configured as adjusting output voltage, and export first control signal by control output end；Voltage limitator, quilt It is configured to the voltage value of first control signal being limited to less than threshold value；Current sensor is configured as sensing and adjusts electric current Intensity, and generate the second control signal with voltage value corresponding with the value of the intensity sensed；And driving signal Generator is configured as generating driving signal based on first control signal and second control signal, and first control signal has Lower than the voltage value of threshold value.
When the voltage value of output voltage is equal to the voltage value adjusted by output voltage regulator or is greater than lowest critical value When, the voltage value of first control signal is equal to the voltage of control output end, and when the voltage value of output voltage is lower than by defeated Out voltage regulator adjust voltage value and be less than lowest critical value when, voltage limitator is configured as first control signal Voltage value be limited to less than threshold value.
When the voltage value of the voltage of control output end is equal to or less than the voltage value of limitation reference voltage, the first control The voltage value of signal is equal to the voltage of control output end, and when the voltage value of the voltage of control output end is greater than limitation ginseng When examining the voltage value of voltage, voltage limitator is configured as the voltage value of first control signal being limited to less than threshold value.
Control circuit is configured as the voltage value of adjustment limitation reference voltage.
Control circuit is configured as the voltage value that adjustment is used to adjust for the adjusting reference voltage of output voltage.
Adjusting electric current includes that increased first the first current component being spaced and current value subtract current value therebetween therebetween Second current component and electrical management chip package at the second small interval further include input current estimating circuit, are matched It is set to by using first current component at the first interval and estimates the intensity of input current, input current is based on rectified What voltage generated.
Input current estimating circuit includes: current component extractor, and it is electric from adjusting to be configured to respond to driving signal Stream extracts first current component at the first interval；And estimation signal generator, it is configured as based on extracted first electricity Flow component generates estimation signal, and estimation signal includes information corresponding with the mean intensity of the estimation of input current.
Input current estimating circuit further includes scaler, is configured as the mean intensity of the estimation of adjustment input current Amplitude.
The exemplary embodiment of present inventive concept can provide DC-DC conversion circuit, comprising: electric pressure converter is configured Electric current is adjusted to generate in response to driving signal, and exports output voltage and output electric current；Output voltage regulator is configured To generate first control signal in response to output voltage；Voltage limitator is configured as protecting the voltage value of first control signal It holds as lower than threshold value；Current sensor is configured to respond to adjust electric current generation second control signal；And driving signal hair Raw device, is configured to respond to first control signal and second control signal generates driving signal.
Voltage limitator is connected to the output of output voltage regulator and the input of drive signal generator.
Voltage limitator includes operational amplifier, and operational amplifier, which has, to be configured as receiving the first of the first reference voltage Input terminal and the second input terminal for being configured as reception first control signal.
When the voltage value of first control signal is greater than the voltage value of the first reference voltage, the voltage value of first control signal Lower than threshold value.
Voltage limitator includes diode, and diode has cathode and the connection for the output terminal for being connected to operational amplifier To the anode of the second input terminal of operational amplifier.
Detailed description of the invention
By reference to the attached drawing exemplary embodiment that present inventive concept is described in detail, the above and other spy of present inventive concept Sign will be apparent, in the accompanying drawings:
Fig. 1 is the block diagram for showing direct current (the DC)-DC conversion circuit for the exemplary embodiment conceived according to the present invention；
Fig. 2 is the figure for showing the electric pressure converter shown in FIG. 1 for the exemplary embodiment conceived according to the present invention；
Fig. 3 is the process for showing the intensity of description control and regulation electric current for the exemplary embodiment conceived according to the present invention Curve graph；
Fig. 4 is the block diagram for showing the output voltage regulator shown in FIG. 1 for the exemplary embodiment conceived according to the present invention；
Fig. 5 is the figure for showing the divider shown in Fig. 4 for the exemplary embodiment conceived according to the present invention；
Fig. 6 is the figure for showing the current sensor shown in FIG. 1 for the exemplary embodiment conceived according to the present invention；
Fig. 7 is the figure for showing the drive signal generator shown in FIG. 1 for the exemplary embodiment conceived according to the present invention；
Fig. 8 is the switch-over control signal generator shown in Fig. 7 for showing the exemplary embodiment conceived according to the present invention Figure；
Fig. 9 is the figure for showing the DC-DC conversion circuit shown in FIG. 1 for the exemplary embodiment conceived according to the present invention；
Figure 10 be show the exemplary embodiment conceived according to the present invention for describe when force make DC-DC conversion circuit Output voltage voltage value decline when the case where curve graph；
Figure 11 be show the exemplary embodiment conceived according to the present invention for describe limitation and first control signal phase The curve graph of the process of corresponding voltage value；
Figure 12 is the process of the operation of the DC-DC conversion circuit of the exemplary embodiment for describing to conceive according to the present invention Figure；
Figure 13 is the block diagram for showing the DC-DC conversion circuit for the exemplary embodiment conceived according to the present invention；
Figure 14 is the process for showing the intensity of description estimation input current for the exemplary embodiment conceived according to the present invention Figure；
Figure 15 is the block diagram for showing the electrical management chip package for the exemplary embodiment conceived according to the present invention；
Figure 16 is the block diagram for showing the electrical management chip package for the exemplary embodiment conceived according to the present invention；
Figure 17 is to show input current estimating circuit shown in the Figure 16 for the exemplary embodiment conceived according to the present invention Figure；
Figure 18 is the exemplary embodiment conceived according to the present invention for describing to estimate using input current shown in Figure 17 Circuit is counted to estimate the figure of the process of the intensity of input current；
Figure 19 is to show input current estimating circuit shown in the Figure 16 for the exemplary embodiment conceived according to the present invention Figure；
Figure 20 is the exemplary embodiment conceived according to the present invention for describing to estimate using input current shown in Figure 19 Circuit is counted to estimate the figure of the process of the intensity of input current；
Figure 21 is the power transmission system including DC-DC conversion circuit for showing the exemplary embodiment conceived according to the present invention The block diagram of the receiver of system；
Figure 22 is the power transmission system including DC-DC conversion circuit for showing the exemplary embodiment conceived according to the present invention The block diagram of the transmitters and receivers of system；
Figure 23 be show the exemplary embodiment conceived according to the present invention include Figure 22 shown in power transmission system Mobile electronic device electric power management system block diagram；
Figure 24 is that show the exemplary embodiment conceived according to the present invention includes the movement of wireless power transmission manager The block diagram of equipment；
Figure 25 is the frame for showing the electronic equipment including electrical management block for the exemplary embodiment conceived according to the present invention Figure；And
Figure 26 shows the " Internet of Things including user and electronic equipment that the exemplary embodiment conceived according to the present invention is realized (IoT) " system.
Specific embodiment
The exemplary embodiment of present inventive concept is described below with reference to the accompanying drawings.However, present inventive concept can be with various Different forms implements, and is not necessarily to be construed as being limited only to shown embodiment.Unless otherwise mentioned, no Similar element is then indicated using similar reference marker through drawing and description, and therefore can be not repeated to describe. In the accompanying drawings, for clarity, the size and relative size of layer and region can be exaggerated.
It is as employed herein, singular "one", " one " and "the" be also intended to include plural form, unless civilization up and down Really provide opposite instruction.
It will be understood that when an element or layer be referred to as another element or layer " on ", " being connected to " or " being couple to " When another element or layer or " neighbouring " another element or layer, it can directly on another element or layer, be directly connected to Or it is couple to another element or layer or is directly adjacent to another element or layer, or there may also be elements or layer between two parties.
Fig. 1 is the block diagram for showing direct current (the DC)-DC conversion circuit 100 for the exemplary embodiment conceived according to the present invention. With reference to Fig. 1, DC-DC conversion circuit 100 may include electric pressure converter 120, output voltage regulator 130, voltage limitator 140, current sensor 150 and drive signal generator 160.DC-DC conversion circuit 100 can receive input voltage vin, and Output voltage Vout and output electric current Iout can be exported.
Electric pressure converter 120 can receive input voltage vin.Electric pressure converter 120 can receive driving signal DS.Voltage Converter 120 can generate in response to driving signal DS and adjust electric current Irg.Adjusting electric current will be more fully described with reference to Fig. 3 Irg.Electric pressure converter 120 can export output voltage Vout.In addition, electric pressure converter 120 can be exported based on adjusting electric current The output electric current Iout that Irg is generated.Electric pressure converter 120 is more fully described structurally and operationally in reference Fig. 2.
The adjustable output voltage Vout of output voltage regulator 130.To achieve it, output voltage regulator 130 may be coupled to the node for exporting output voltage Vout.In addition, the first control can be generated in output voltage regulator 130 Signal CS1 processed be used to control the intensity of output electric current Iout.Output voltage regulator 130 may include control output end Son.First control signal CS1 can be exported by control output end.Output electricity will be more fully described with reference to Fig. 4 and Fig. 5 Press adjuster 130 structurally and operationally.
Voltage limitator 140 can limit voltage corresponding with first control signal CS1.According to voltage limitator 140, The value of voltage corresponding with first control signal CS1 may remain under threshold value.It will be retouched in more detail with reference to Fig. 9 to Figure 11 State voltage limitator 140 structurally and operationally.
Current sensor 150 can sense the intensity for adjusting electric current Irg.In addition, current sensor 150 can be generated second Control signal CS2.Second control signal CS2 can have voltage value corresponding with the value of the intensity of electric current Irg.Second control Signal CS2 can be used to control the intensity of output electric current Iout together with first control signal CS1.It will be more detailed with reference to Fig. 6 Ground describes current sensor 150 structurally and operationally.
Drive signal generator 160 can receive first control signal CS1.Particularly, when DC-DC conversion circuit 100 wraps When including voltage limitator 140, the first control signal CS1 for being provided to drive signal generator 160, which can have, to be restricted to Lower than the voltage value of threshold value.In addition, drive signal generator 160 can receive second control signal CS2.Drive signal generator 160 can be generated driving signal DS.Driving signal can be generated based on first control signal CS1 and second control signal CS2 DS.Drive signal generator 160 is more fully described structurally and operationally in reference Fig. 7 and Fig. 8.
Fig. 2 is the figure for showing the electric pressure converter shown in FIG. 1 120 for the exemplary embodiment conceived according to the present invention.Ginseng Fig. 2 is examined, electric pressure converter 120 may include the first transistor TR1, second transistor TR2, inductance component L 1 and capacity cell C1。
The first terminal of the first transistor TR1 may be coupled to the node for receiving input voltage vin.Second transistor TR2 can connect between the Second terminal and ground nodes of the first transistor TR1.The first transistor TR1 and second transistor TR can be controlled by the first driving signal DS1 and the second driving signal DS2 respectively.The driving letter of first driving signal DS1 and second Number DS2 can be included in driving signal DS (with reference to Fig. 1), and driving signal DS is by drive signal generator 160 (with reference to figure 1) it generates.The first transistor TR1 and second transistor TR2 can believe respectively responsive to the driving of the first driving signal DS1 and second Number DS2 is successively switched on.
In Fig. 2, the first transistor TR1 and second transistor TR2 are N-channel metal-oxide semiconductor (MOS) (NMOS) crystal Pipe.However, present inventive concept is without being limited thereto.For example, at least one of the first transistor TR1 and second transistor TR2 can be with It is realized by P-channel metal-oxide-semiconductor (PMOS) transistor.In this case, generate the first driving signal DS1 and The process of second driving signal DS2 can be different from the mistake when two NMOS transistors are included in electric pressure converter 120 Journey.
One terminal of inductance component L 1 may be coupled to the Second terminal of the first transistor TR1.As the first transistor TR1 When conducting and second transistor TR2 cut-off, the intensity for flowing through the electric current of inductance component L 1 can increase due to input voltage vin Add.On the other hand, when the first transistor TR1 ends and second transistor TR2 is connected, the electric current of inductance component L 1 is flowed through Intensity can reduce due to ground voltage.According to the above process, the adjusting electric current Irg for flowing through inductance component L 1 can be generated. This will be described more fully with reference to Fig. 3.
Capacity cell C1 can connect between the node and ground nodes for exporting output voltage Vout.Capacity cell C1 can be connected steadily to export output electric current Iout.
As shown in Fig. 2, inductance component L 1 is discrete inductor and capacity cell C1 is discrete capacitor.However, Present inventive concept is without being limited thereto.For example, inductance component L 1 can pass through " simulaed inductance " including operational amplifier and capacitor To realize.Capacity cell C1 can be realized by that can be charged and discharged any other element of charge.Electricity described in Fig. 2 The structure of pressure converter 120 is merely exemplary.Various changes or modification can be made to electric pressure converter 120.
Fig. 3 is the mistake for showing the intensity of description control and regulation electric current Irg for the exemplary embodiment conceived according to the present invention The curve graph of journey.Particularly, the adjusting electric current Irg of Fig. 3 can be generated by electric pressure converter 120 shown in Fig. 2.
The curve graph shown on the left of Fig. 3, in the time interval phase from 0 to t1, from t2 to t3 and from t4 to t5 Between, the first transistor TR1 (referring to Fig. 2) can be connected, and second transistor TR2 (referring to Fig. 2) can end.Work as first crystal When pipe TR1 conducting and second transistor TR2 cut-off, the intensity for adjusting electric current Irg can be since input voltage vin be (with reference to figure 2) increase.On the other hand, during the time interval from t1 to t2, from t3 to t4 and from t5 to t6, the first transistor TR1 It can end, and second transistor TR2 can be connected.When the first transistor TR1 cut-off and second transistor TR2 is connected When, the intensity for adjusting electric current Irg can reduce due to ground voltage.
As being previously mentioned with reference to Fig. 2, the first transistor TR1 and second transistor TR2 can be successively switched on.Adjust electric current Irg can be generated by sequentially turning on the first transistor TR1 and second transistor TR2.Adjusting electric current Irg may include electric current Value therebetween increased first time interval (for example, the time interval from 0 to t1, from t2 to t3 and from t4 to t5) first The second time interval that current component and current value reduce therebetween (for example, the time interval from t1 to t2, from t3 to t4, With from t5 to t6) the second current component.
As the first situation (with reference to " situation 1 " in Fig. 3), curve graph shown in the upper right quarter with reference to Fig. 3 is retouched The case where stating the intensity increase for adjusting electric current Irg.When the time interval of the first transistor TR1 conducting is (for example, between first time Every --- 0 to t1, t2 to t3 and t4 to t5) length becomes longer and second transistor TR2 conducting time interval (example Such as, the second time interval --- t1 to t2, t3 to t4 and t5 to t6) length when becoming shorter, adjust the intensity of electric current Irg It can increase.When adjusting electric current Irg has desired intensity, the length of the time interval of the first transistor TR1 conducting can be with Become identical as the length of time interval that second transistor TR2 is connected, thus increases the intensity for adjusting electric current Irg.
As second situation (with reference to " situation 2 " in Fig. 3), curve graph shown in the right lower quadrant with reference to Fig. 3 is retouched The case where stating the intensity reduction for adjusting electric current Irg.When the time interval of the first transistor TR1 conducting is (for example, between first time Every --- 0 to t1, t2 to t3 and t4 to t5) length becomes shorter and the time interval (example of second transistor TR2 conducting Such as, the second time interval --- t1 to t2, t3 to t4 and t5 to t6) length when becoming longer, adjust the intensity of electric current Irg It can reduce.When adjusting electric current Irg has desired intensity, the length of the time interval of second transistor TR2 conducting can be with Become identical as the length of time interval that the first transistor TR1 is connected, thus reduces the intensity for adjusting electric current Irg.
When including the first driving signal DS1 and the second driving signal DS2 (reference in driving signal DS (with reference to Fig. 1) When Fig. 2) being controlled, the length of the period of each of the first transistor TR1 and second transistor TR2 conducting can be adjusted It is whole.Therefore, the intensity for adjusting electric current Irg can be adjusted by control the first driving signal DS1 and the second driving signal DS2.
Fig. 4 is the frame for showing the output voltage regulator shown in FIG. 1 130 for the exemplary embodiment conceived according to the present invention Figure.With reference to Fig. 4, output voltage regulator 130 may include divider 131 and adjusting operational amplifier 135.
Divider 131 may be coupled to the node for exporting output voltage Vout.Partial pressure electricity can be generated in divider 131 Press Vdiv.In the exemplary embodiment of present inventive concept, the voltage value of branch pressure voltage Vdiv can be controlled as being proportional to defeated The voltage value of voltage Vout out.Divider 131 is more fully described structurally and operationally in reference Fig. 5.
Adjusting operational amplifier 135 may include two input terminals.Adjust one of the input terminal of operational amplifier 135 It may be coupled to for receiving the node for adjusting reference voltage Vreg.Adjusting reference voltage Vreg is for adjusting output voltage The voltage of Vout.Another input terminal for adjusting operational amplifier 135 may be coupled to the section for receiving branch pressure voltage Vdiv Point.
In the exemplary embodiment of present inventive concept, the voltage value of adjusting reference voltage Vreg can be adjustable. According to the characteristic for adjusting operational amplifier 135, branch pressure voltage Vdiv can have voltage identical with reference voltage Vreg is adjusted Value.Therefore, the voltage value of branch pressure voltage Vdiv can be by could be adjusted to adjust to the voltage value for adjusting reference voltage Vreg. As a result, the output voltage Vout with desired voltage values can be adjusted by controlling to adjust reference voltage Vreg.
Adjusting operational amplifier 135 may include control output end.Adjusting operational amplifier 135 can be defeated by controlling Terminal exports first control signal CS1 out.First control signal CS1 can be by using adjusting reference voltage Vreg and partial pressure Voltage Vdiv is generated.In the exemplary embodiment of present inventive concept, first control signal CS1 can be electric based on reference is adjusted The difference between the voltage value of Vreg and the voltage value of branch pressure voltage Vdiv is pressed to generate.First control signal CS1 can be used for The intensity of control output electric current Iout.
Fig. 5 is the figure for showing the divider shown in Fig. 4 131 for the exemplary embodiment conceived according to the present invention.With reference to figure 5, divider 131 may include first resistor element R1 and second resistance element R2.
The first terminal of first resistor element R1 may be coupled to the node for exporting output voltage Vout.Second resistance Element R2 can connect between the Second terminal and ground nodes of first resistor element R1.Output voltage Vout can pass through One resistive element R1 and second resistance element R2 are divided.In the exemplary embodiment of present inventive concept, branch pressure voltage Vdiv It can be the voltage of the Second terminal of first resistor element R1.For example, the voltage value of branch pressure voltage Vdiv can be controlled as just Than in the voltage value of output voltage Vout.Branch pressure voltage Vdiv, which can be provided to, adjusts operational amplifier 135 (with reference to Fig. 4) One of input terminal.
It will be appreciated that output voltage regulator 130 can have different from structure shown in Fig. 4 and Fig. 5.For example, In Fig. 5, first resistor element R1 and second resistance element R2 are discrete resistors.However, first resistor element R1 and Two resistive element R2 can be realized by any other element for declining voltage.
Fig. 6 is the figure for showing the current sensor shown in FIG. 1 150 for the exemplary embodiment conceived according to the present invention.Ginseng Fig. 6 is examined, current sensor 150 may include sense resistor Rs and current sensing amplifiers 155.
Sense resistor Rs can connect the inductance in node and electric pressure converter 120 for exporting output voltage Vout Between a terminal of element L1.Therefore, the adjusting electric current Irg for flowing through inductance component L 1 can flow through sense resistor Rs.? In the exemplary embodiment of present inventive concept, sense resistor Rs is discrete resistor.However, present inventive concept is not limited to This.For example, sense resistor Rs can be realized by any other element for declining voltage.
Current sense amplifier 155 can sense the intensity for adjusting electric current Irg.Particularly, current sense amplifier 155 can To sense the intensity for the adjusting electric current Irg for flowing through sense resistor Rs.Current sense amplifier 155 can be defeated based on sensing result Second control signal CS2 out.Second control signal CS2 can have opposite with the value of the intensity sensed of electric current Irg is adjusted The voltage value answered.Second control signal CS2 can be used for and first control signal CS1 (with reference to Fig. 1) together control output electricity Flow the intensity of Iout.
It will be appreciated that the structure of current sensor 150 shown in Fig. 6 is merely exemplary.Current sensor 150 Structure can be changed or modified as different from structure shown in Fig. 6.For example, current sensor 150 can only be configured to use The intensity of electric current Irg is adjusted in sensing and exports second control signal CS2.
Fig. 7 is the drive signal generator shown in FIG. 1 160 for showing the exemplary embodiment conceived according to the present invention Figure.With reference to Fig. 7, drive signal generator 160 may include switch-over control signal generator 161 and switching driver 165.
Switch-over control signal generator 161 can receive first control signal CS1 and second control signal CS2.In this hair In the exemplary embodiment of bright design, first control signal CS1 can be from the adjusting of output voltage regulator 130 (referring to Fig. 1) Operational amplifier 135 (referring to Fig. 4) output may then pass through voltage limitator 140 (with reference to Fig. 1) and be provided to switching control Signal generator 161.In the exemplary embodiment of present inventive concept, second control signal CS2 can be from current sensor 150 The current sense amplifier 155 (referring to Fig. 6) of (referring to Fig. 1) provides.In the exemplary embodiment of present inventive concept, it is provided It can have the voltage value being restricted to lower than threshold value to the first control signal CS1 of switch-over control signal generator 161.
Switch-over control signal CSS can be generated in switch-over control signal generator 161.Switch-over control signal CSS can pass through It is generated using first control signal CS1 and second control signal CS2.
Switching driver 165 can receive switch-over control signal CSS.Switching driver 165 can be believed according to switching control Number CSS (referring to Fig. 1) generates driving signal DS.For example, the first driving signal DS1 and second can be generated in switching driver 165 Driving signal DS2.First driving signal DS1 can be provided to the control terminal of the first transistor TR1, and the second driving letter Number DS2 can be provided to the control terminal of second transistor TR2.The first transistor TR1 and second transistor TR2 can distinguish It is sequentially turned in response to the first driving signal DS1 and the second driving signal DS2.
As described above, first control signal CS1 and second control signal CS2 can be used to control output electric current Iout's Intensity.First driving signal DS1 and the second driving signal DS2 can be based on first control signal CS1 and second control signal CS2 It controls, so that adjustment adjusts the intensity of electric current Irg as described with reference to Fig. 3.
Fig. 8 is the switch-over control signal generator 161 shown in Fig. 7 for showing the exemplary embodiment conceived according to the present invention Figure.With reference to Fig. 8, switch-over control signal generator 161 may include comparator/operational amplifier 162 and modulator 164.
Comparator/operational amplifier 162 may include two input terminals.Comparator/operational amplifier 162 can be defeated by two Enter terminal and receives first control signal CS1 and second control signal CS2.In the exemplary embodiment of present inventive concept, mentioned The first control signal CS1 of supply comparator/operational amplifier 162 can have the voltage value being restricted to lower than threshold value.
As described above, second control signal CS2 can have the intensity sensed with adjusting electric current Irg (with reference to Fig. 1) The corresponding voltage value of value.However, adjust electric current Irg may include current value therebetween increased first time interval the Second current component of the second time interval that one current component and current value reduce therebetween.Therefore, second control signal CS2 It may include ripple (ripple).Comparator/operational amplifier 162 can be by being used together the control of first control signal CS1 and second Signal CS2 processed carrys out the output voltage that output ripple is removed.
Modulator 164 can receive modulation voltage Vm.In addition, modulator 164 can receive comparator/operational amplifier 162 Output voltage.Modulator 164 can be with for example, be come by using the output voltage of modulation voltage Vm and comparator/operational amplifier 162 Execute pulsewidth modulation.Switch-over control signal CSS can be generated as modulation result in modulator 164.Switch-over control signal CSS can be with It is provided to switching driver 165 (with reference to Fig. 7).
It will be appreciated that drive signal generator 160 can be configured as different from Fig. 7 and it is shown in Fig. 8 like that.
Fig. 9 is the figure for showing the DC-DC conversion circuit 100 shown in FIG. 1 for the exemplary embodiment conceived according to the present invention. With reference to Fig. 9, DC-DC conversion circuit 100 may include electric pressure converter 120, output voltage regulator 130, current sensor 150 With drive signal generator 160.Particularly, electric pressure converter 120, output voltage regulator 130, current sensor 150 and drive Dynamic signal generator 160 is similar to those of above with reference to described in Fig. 1 to Fig. 8.Therefore, it is convenient to omit about electric pressure converter 120, the redundancy description of the structure and function of output voltage regulator 130, current sensor 150 and drive signal generator 160.
In the exemplary embodiment of present inventive concept, voltage limitator 140 may include diode D1 and limitation operation Amplifier 145.Limitation operational amplifier 145 may include first input end (+), the second input terminal (-) and compare output Terminal.Limitation reference voltage Vlim can be received by first input end (+) by limiting operational amplifier 145.Limitation is with reference to electricity Pressure Vlim is used to for the voltage value of voltage corresponding with first control signal CS1 to be limited to less than the voltage of threshold value.Limit Operational amplifier 145 processed can receive the electricity of control output end of output voltage regulator 130 by the second input terminal (-) Pressure.Limiting operational amplifier 145 can be with for example, compares the amplitude and output voltage regulator 130 for limiting reference voltage Vlim The amplitude of the voltage of control output end.Limitation operational amplifier 145 can export comparison result by comparing output terminal.
In the exemplary embodiment of present inventive concept, the anode of diode D1 may be coupled to limitation operational amplifier 145 the second input terminal (-).The cathode of diode D1 may be coupled to the comparison output terminal of limitation operational amplifier 145. In this case, the voltage value of voltage corresponding with first control signal CS1 can be limited to low by voltage limitator 140 In the voltage value of limitation reference voltage Vlim.
When the voltage value of the voltage of control output end of output voltage regulator 130 is equal to or less than limitation reference voltage (for example, when the voltage value of limitation reference voltage Vlim is greater than the voltage of the voltage of control output end when the voltage value of Vlim Value), there is the electric signal of " just " characteristic from the comparison output terminal output of limitation operational amplifier 145.However, from limitation operation The nonpassage of signal that amplifier 145 exports crosses diode D1, because the cathode of diode D1 is connected to limitation operational amplifier 145.Therefore, voltage corresponding with first control signal CS1 can become equal to the control output of output voltage regulator 130 The voltage of terminal by voltage limitator 140 without being influenced.
On the other hand, when the voltage value of the voltage of control output end of output voltage regulator 130 is greater than limitation reference (for example, the voltage value of limitation reference voltage Vlim is less than the voltage of the voltage of control output end when the voltage value of voltage Vlim Value), there is the electric signal of " negative " characteristic from the comparison output terminal output of limitation operational amplifier 145.In this way, signal can be from Diode D1 anode is flowed to the direction of cathode.Therefore, voltage corresponding with first control signal CS1 can be limited by voltage The influence of device 140 processed.Particularly, voltage limitator 140 can keep the voltage of voltage corresponding with first control signal CS1 Value is lower than threshold value.
In short, when the voltage value of the voltage of control output end of output voltage regulator 130 is equal to or less than limitation ginseng When examining the voltage value of voltage Vlim, voltage corresponding with first control signal CS1 can become equal to output voltage regulator The voltage of 130 control output end.On the other hand, when the electricity of the voltage of control output end of output voltage regulator 130 When pressure value is greater than the voltage value of limitation reference voltage Vlim, voltage limitator 140 can keep (for example, limitation) and the first control The voltage value of the corresponding voltage of signal CS1 is lower than threshold value.
In the exemplary embodiment of present inventive concept, the voltage value of limitation reference voltage Vlim can be adjustable. For example, adjustable for limiting the threshold value of the voltage value of voltage corresponding with first control signal CS1.In such case Under, threshold value can be adjusted by adjusting the voltage value of limitation reference voltage Vlim.
It will be appreciated that the structure of voltage limitator 140 shown in Fig. 9 is merely exemplary.Voltage limitator 140 can To be configured as being different from structure shown in Fig. 9.For example, voltage limitator 140 can be configured as only limitation and the first control The voltage value of the corresponding voltage of signal CS1 processed is lower than threshold value.
The DC-DC conversion circuit 100 for the exemplary embodiment conceived according to the present invention may include voltage limitator 140 Example, so that DC-DC conversion circuit 100 can perform various functions.In order to help to further understand present inventive concept, relatively Make description in following situations: (1) DC-DC conversion circuit does not include voltage limitator 140, and (b) DC-DC conversion circuit includes Voltage limitator 140.
With reference to Fig. 9, DC-DC conversion circuit 100 can receive input voltage vin, and can export output voltage Vout With output electric current Iout.The output voltage Vout and output electric current Iout exported from DC-DC conversion circuit 100 can be provided to (multiple) other circuits, (multiple) chip or (multiple) system.It receives output voltage Vout and exports (multiple) of electric current Iout Other circuits, (multiple) chip or (multiple) system can be by using the output voltage Vout received and the output received Electric current Iout executes the function of their own.In other words, DC-DC conversion circuit 100 can provide voltage and or current, it Used in various (multiple) circuits, (multiple) chip or (multiple) system.
For example, it is assumed that the battery of hand-hold electronic equipments (for example, mobile phone) is connected to for exporting output voltage Vout The node of (referring to Figure 21).In this case, output voltage Vout and output electric current Iout can correspond respectively to for pair The charging voltage and charging current that battery charges.In other words, when battery is not completely charged, it can be by making It is charged with output voltage Vout and output electric current Iout.Adjusting reference voltage Vreg appropriate can be provided to adjusting operation Amplifier 135 is to charge the battery.In addition, the voltage value of branch pressure voltage Vdiv can be according to adjusting reference voltage Vreg Voltage value be adjusted.Therefore, the adjustable output voltage Vout for charging the battery.
However, the voltage for being connected to the input terminal of the battery of the node for exporting output voltage Vout can have ratio The small voltage value of the voltage value of output voltage Vout.The reason is that, the less quantity of electric charge is deposited when battery is not completely charged Storage is in the battery.For example, for can have about 4.2 volts of voltage value to the output voltage Vout that battery charges, but completely The input terminal voltage of the battery of electric discharge can have the voltage value of about 2.5V.For this reason, when not being completely charged When battery is connected to the node for exporting output voltage Vout, output voltage Vout can have the input terminal voltage of battery Voltage value, rather than based on adjust reference voltage Vreg adjust voltage value.In other words, when the battery not being completely charged When being connected to the node for exporting output voltage Vout, the voltage value for making output voltage Vout can be forced to decline.
When the voltage value of output voltage Vout drops to the voltage value of the input terminal voltage for the battery not being completely charged When, the voltage value of branch pressure voltage Vdiv also declines.Therefore, the voltage value of branch pressure voltage Vdiv becomes than adjusting reference voltage Vreg Voltage value it is small.As a result, from the voltage for adjusting the voltage corresponding with first control signal CS1 that operational amplifier 135 exports Value can increase.
When voltage limitator 140 is not included in DC-DC conversion circuit 100, there is the first of increased voltage value Control signal CS1 is provided to the first input end of the comparator/operational amplifier 162 of drive signal generator 160.According to than Compared with the characteristic of operational amplifier 162, when voltage corresponding with the first control signal CS1 of first input end is provided to When voltage value increases, the voltage value of voltage corresponding with the second control signal CS2 of the second input terminal is provided to also increases Add.When the voltage value of voltage corresponding with second control signal CS2 increases, the sensing electricity in current sensor 150 is flowed through The intensity for hindering the adjusting electric current Irg of device Rs can increase.As a result, the intensity of output electric current Iout increases.
In short, when DC-DC conversion circuit does not include voltage limitator 140 and the battery that is not completely charged is connected to When DC-DC conversion circuit 100, the intensity of output electric current Iout can increase.When the intensity for exporting electric current Iout increases, power consumption It can increase with heat dissipation.In addition, the output electric current Iout with increased intensity may be not suitable for charging the battery.
Therefore, in some cases, in addition to DC-DC conversion circuit 100, other may be used also using the mobile electronic device of battery To include additional conversion circuit or chip (for example, charger) for charging to battery.The function of additional conversion circuit or chip Energy can be substantially identical as the function of DC-DC conversion circuit 100.It is attached when the repeat function with DC-DC conversion circuit 100 When conversion circuit or chip being added to be included in mobile electronic device, circuit region can be can increase and transfer efficiency may drop It is low.
On the other hand, when the exemplary embodiment conceived according to the present invention, DC-DC conversion circuit 100 is limited including voltage When device 140, voltage Vc corresponding with first control signal CS1 can be restricted to the voltage value lower than threshold value.Therefore, First control signal CS1 with the voltage value for being equal to or less than threshold value can be provided to comparator/operational amplifier 162.
When corresponding with the first control signal CS1 of first input end for being provided to comparator/operational amplifier 162 When the voltage value of voltage (for example, Vc) is restricted to lower than threshold value, with the second input for being provided to comparator/operational amplifier 162 The voltage value of the corresponding voltage of second control signal CS2 of terminal can also be limited.Therefore, current sensor 150 is flowed through The intensity of the adjusting electric current Irg of sense resistor Rs can not increase.As a result, output electric current Iout can be exported steadily.
In short, the voltage value as output voltage Vout drops below the voltage value adjusted by output voltage regulator 130 When, voltage limitator 140 can keep the voltage value of (for example, limitation) voltage corresponding with first control signal CS1 to be lower than Threshold value (for example, voltage value of limitation reference voltage Vlim).
Up to the present, it has been described that the battery not being completely charged is connected to the case where DC-DC conversion circuit 100. When battery remains connected to DC-DC conversion circuit 100, battery passes through output electric current Iout charging.As battery is electrically charged, electricity The voltage value of the input terminal voltage in pond can gradually increase.
When the voltage value of the input terminal voltage of battery increases, the voltage value of output voltage Vout also increases.Work as output When the voltage value of voltage Vout increases, the voltage value of branch pressure voltage Vdiv can increase.Therefore, the voltage value of branch pressure voltage Vdiv Difference between the voltage value of adjusting reference voltage Vreg can reduce.As a result, with from adjust that operational amplifier 135 exports the The voltage value of the corresponding voltage of one control signal CS1 can reduce.
When corresponding with the first control signal CS1 of first input end for being provided to comparator/operational amplifier 162 When the voltage value of voltage reduces, the second control signal CS2 with the second input terminal for being provided to comparator/operational amplifier 162 The voltage value of corresponding voltage also reduces.Therefore, the adjusting electric current Irg of the sense resistor Rs of current sensor 150 is flowed through Intensity can increase.Therefore, the intensity for exporting electric current Iout reduces.Intensity with output electric current Iout reduces, battery The voltage value of input terminal voltage gradually increases.When battery is completely charged, output electric current Iout intensity can be close to for "0".Battery can charge according to the above process.
As described above, the DC-DC including voltage limitator 140 for the exemplary embodiment conceived according to the present invention converts electricity Road 100 can perform various functions.In the exemplary embodiment of present inventive concept, DC-DC conversion circuit 100 be may be operative to Charger circuit.Therefore, the DC-DC conversion circuit 100 for the exemplary embodiment conceived according to the present invention can be provided separately Without additional conversion circuit.Therefore, when chip, equipment or system include the exemplary embodiment conceived according to the present invention When DC-DC conversion circuit 100, the circuit region for including in chip, equipment or system be can reduce and transfer efficiency can mention It is high.
Figure 10 be show the exemplary embodiment conceived according to the present invention for describe when force make DC-DC conversion circuit Output voltage Vout voltage value decline when the case where curve graph.Figure 11 is to show the exemplary reality conceived according to the present invention Apply the curve graph of the process for describing to limit voltage value corresponding with first control signal CS1 of example.Electricity shown in Fig. 9 The operation of pressure limiter 140 will be more fully described with reference to Fig. 9 to Figure 11.
In Figure 10, solid line indicates the variation of the voltage value of output voltage Vout.It is defeated during normal time interval ti1 The voltage value of voltage Vout can keep constant or fluctuate in close limit surplus out.For example, the voltage value of output voltage Vout It can be constantly maintained at by the voltage value adjusted of output voltage regulator 130.However, the voltage value of output voltage Vout can To fluctuate in the interval defined by upper boundary values Vtb and lower border value Vbb, this depends on the state or surrounding ring of circuit element Border.
Lowest critical value Vc can be to stablize output output electric current Iout, and the voltage value of output voltage Vout should have Some minimum amount of voltage that.It is opposite with first control signal CS1 when the voltage value of output voltage Vout is less than lowest critical value Vc The voltage value for the voltage answered can increase, and therefore, the intensity of output electric current Iout can increase.
Upper boundary values Vtb's is greater than lowest critical value Vc with lower border value Vbb.Therefore, even if the electricity of output voltage Vout Pressure value can fluctuate in the interval defined by upper boundary values Vtb and lower border value Vbb, this shadow to DC-DC conversion circuit 100 Sound may not be very big.However, when fluctuation, it can be by controlling first control signal CS1 for the voltage of output voltage Vout Value maintains desired value.
In addition, in Figure 11, during normal time interval ti1, the electricity of voltage corresponding with first control signal CS1 Pressure value can be less than threshold value Vth.The reason of being kept above lowest critical value Vc here it is the voltage value of output voltage Vout.? During normal time interval ti1, the voltage value of voltage corresponding with first control signal CS1 is held below threshold value Vth, i.e., Operate voltage limitator 140 not.
On the other hand, in specific time ta, the voltage value of output voltage Vout can be lowered to than lowest critical value Vc Small drop-out voltage value Vd.For example, the battery that ought be completely charged is connected in specific time ta for exporting output electricity When pressing the node of Vout, the voltage value of output voltage Vout can be lowered to drop-out voltage value Vd.As a result, believing with the first control The voltage value of number corresponding voltage of CS1 increases in the limitation time interval ti2 after specific time ta.
When the voltage value of voltage corresponding with first control signal CS1 continues growing during limiting time interval ti2 When (with reference to the dotted line G1 of Figure 11), as described above, the output of output electric current Iout can become unstable.Therefore, in the present invention In the exemplary embodiment of design, voltage limitator 140 can be by the voltage value of voltage corresponding with first control signal CS1 It is limited to less than threshold value Vth (with reference to solid line G2 in Figure 11).When the voltage value quilt of voltage corresponding with first control signal CS1 When being limited to less than threshold value Vth, output electric current Iout can be exported steadily.
For example, when the voltage value of output voltage Vout is equal to the voltage value adjusted by output voltage regulator 130 or is greater than When lowest critical value Vc, the voltage value 130 of the voltage of control output end of output voltage regulator can be lower than limitation reference Voltage Vlim.In this case, voltage corresponding with first control signal CS1 can be equal to output voltage regulator 130 Control output end voltage.In addition, the voltage value of voltage corresponding with first control signal CS1 can be restricted to it is low In threshold value Vth (referring to normal time interval ti1).
On the other hand, for example, being adjusted when the voltage value of output voltage Vout is decreased below by output voltage regulator 130 Voltage value when then becoming smaller than lowest critical value Vc, the electricity of the voltage of control output end of output voltage regulator 130 Pressure value can become larger than the voltage value of limitation reference voltage Vlim.In this case, voltage limitator 140 can will be with The voltage value of the corresponding voltage of one control signal CS1 is limited to less than threshold value Vth.Therefore, opposite with first control signal CS1 The voltage value for the voltage answered can keep below threshold value Vth (with reference to the solid line G2 in limitation time interval ti2).
Figure 12 is the process of the operation of the DC-DC conversion circuit of the exemplary embodiment for describing to conceive according to the present invention Figure.When describing Figure 12 by signal/circuit in reference Fig. 1 or Fig. 9.
In operation sl 10, (for example, in electric pressure converter 120) input voltage (for example, Vin) and first be can receive Driving signal (for example, DS1).It in operation s 120, can (for example, in electric pressure converter 120) generation the first adjusting electric current. The first adjusting electric current can be generated based on the input voltage received in operation sl 10 and the first driving signal.First is adjusted Electric current can have waveform shown in Fig. 3.
Operation S130 in, can be generated (for example, in output voltage regulator 130) first control signal (for example, CS1).In detail, in operation S131, first control signal can be generated based on reference voltage (for example, Vreg) is adjusted.Especially Ground, in operation S132, the exemplary embodiment that can be conceived according to the present invention limits electricity corresponding with first control signal Pressure.Voltage corresponding with first control signal can be restricted to the voltage value lower than threshold value.
In operation S140, (for example, in current sensor 150) second control signal (for example, CS2) can be generated. In detail, in operation S141, the intensity of the first adjusting electric current can be sensed.In addition, can be generated second in operation S142 Control signal.Second control signal can have electricity corresponding with the first adjusting intensity of electric current sensed in operation S141 Pressure value.
The process of the process and operation S140 that operate S130 can not influence each other.First control signal and the second control letter It number can have independently produced.Therefore, the execution sequence of operation S130 and operation S140 is tradable.Alternatively, it operates S130 and operation S140 can be carried out simultaneously.
In operation S150, the second driving signal (for example, DS2) can be generated.It can be based on generating in step s 130 First control signal and the second control signal that is generated in step S140 generate the second driving signal.Particularly, at this In the exemplary embodiment of inventive concept, voltage corresponding with the first control signal for generating the second driving signal can be with With the voltage value being restricted to lower than threshold value.
In operation S160, the second adjusting electric current can be generated.It can generate based on input voltage and in step S150 The second driving signal generate the second adjusting electric current.Second adjusting electric current can have waveform shown in Fig. 3.Such as refer to Fig. 9 To described in Figure 11, the intensity of the second adjusting electric current can not increase, because voltage corresponding with first control signal has There is the voltage value being restricted to lower than threshold value.
In operation S170, output voltage (for example, Vout) and output electric current (for example, Iout) can be exported.In this hair In the exemplary embodiment of bright design, output voltage can be adjusted based on reference voltage is adjusted.Electricity can be adjusted based on second Stream generates output electric current.As referred to described in Fig. 9 to Figure 11, even if the voltage value of output voltage is decreased below adjusting electricity Pressure value, the voltage value of voltage corresponding with first control signal can also be restricted to lower than threshold value, so as to steadily Output output electric current.
Figure 13 is the block diagram for showing the DC-DC conversion circuit 200 for the exemplary embodiment conceived according to the present invention.With reference to figure 13, DC-DC conversion circuits 200 may include electric pressure converter 220, output voltage regulator 230, voltage limitator 240, electric current Sensor 250, drive signal generator 260 and input current estimator 270.DC-DC conversion circuit 200 can receive input electricity Vin is pressed, and output voltage Vout and output electric current Iout can be exported.
Electric pressure converter 220, output voltage regulator 230, voltage limitator 240, current sensor 250, driving signal The structure and function of generator 260 can be analogous respectively to electric pressure converter 120, the output voltage tune described referring to figs. 1 to Fig. 9 Save device 130, voltage limitator 140, current sensor 150 and drive signal generator 160 structure and function, and therefore its Repeated description can be omitted.
Input current estimator 270 can estimate the intensity of input current Iin.It can be generated based on input voltage vin Input current Iin.As described with reference to Fig. 3, adjusting electric current Irg may include current value increased first time interval therebetween Second current component of the second time interval that the first current component and current value reduce therebetween.In the example of present inventive concept Property embodiment in, input current estimator 270 can be by using including that estimate in first current component adjusted in electric current Irg Count the intensity of input current Iin.Estimation signal ES can be generated as estimated result in input current estimator 270.Estimation input The method of the intensity of electric current Iin will be more fully described with reference to Figure 14.
In DC-DC conversion circuit 200, output electric current Iout can be generated according to electric current Irg is adjusted.Adjust electric current Irg can be generated based on input current Iin.Therefore, in order to export the output electric current Iout with expectation strength, to input electricity The intensity of stream Iin is estimated.
In the exemplary embodiment of present inventive concept, for limiting voltage corresponding with first control signal CS1 Threshold value can be adjustable.As described in reference diagram 9, output electric current Iout can pass through limitation and first control signal CS1 phase Corresponding voltage steadily exports.In other words, threshold value can be adjusted to achieve stable output electric current Iout.In this hair In the exemplary embodiment of bright design, threshold value can be adjusted based on the estimated result of input current estimator 270.
In the exemplary embodiment of present inventive concept, output voltage regulator 230 can be electric by using reference is adjusted Pressure is to adjust output voltage Vout.In this case, adjust reference value voltage value can be it is adjustable.In order to be had There is the output voltage Vout of desired voltage values, adjusting reference voltage can be adjusted.
In Figure 13, input current estimator 270 is provided separately with current sensor 250.However, present inventive concept is unlimited In this.For example, input current estimator 270 and current sensor 250 can be realized by single component.Why be so Because both input current estimator 270 and current sensor 250 can be based on adjusting electric current Irg to execute their own Function.It is to be further understood that DC-DC conversion circuit 200 can only include for sense adjust electric current Irg intensity and Estimate the function of the intensity of input current Iin.
Figure 14 is the mistake for showing the intensity of description estimation input current Iin for the exemplary embodiment conceived according to the present invention The figure of journey.
As referring to Figure 3 as described above, adjusting electric current Irg may include current value increased first time interval (example therebetween Such as, the time interval from 0 to t1, from t2 to t3 and from t4 to t5) the first current component and current value reduce therebetween The second time interval (for example, from t1 to t2, from t3 to t4 and from t5 to t6) the second current component.With reference to Figure 14, when When one transistor TR1 conducting and second transistor TR2 cut-off, input current Iin can be transmitted to by the first transistor TR1 Inductance component L 1.Thus, it is possible to obtain the first current component.On the other hand, when the first transistor TR1 ends and the second crystal When pipe TR2 is connected, input current Iin possibly can not be transmitted to inductance component L 1.Thus, it is possible to obtain the second current component.
In other words, input current Iin can influence to include adjusting the first current component in electric current Irg.Therefore, when When first current component of current value increased first time interval therebetween is extracted, the feature of input current Iin can be with base Estimate in extracted first current component.For example, the intensity of input current Iin can be based on the intensity of the first current component To estimate.For estimating that the structure of the circuit of the intensity of input current Iin will be more fully described with reference to 17 and Figure 19.
The intensity of the exemplary embodiment conceived according to the present invention, input current Iin can relatively precisely estimate, rather than Directly measure the intensity of input current Iin.In addition, the intensity of input current Iin can be in DC-DC conversion circuit 200 (with reference to figure 13) by real-time monitoring while operation.The exemplary embodiment conceived according to the present invention can accurately be controlled including DC- Chip, equipment or the system of DC conversion circuit 200.
Figure 15 is the block diagram for showing the electrical management chip package 300 for the exemplary embodiment conceived according to the present invention.Ginseng Figure 15 is examined, electrical management chip package 300 may include rectification circuit 301, DC-DC conversion circuit 302 and control circuit 303. However, electrical management chip package 300 may further include the component shown in Figure 15 other than other components.In this hair In the exemplary embodiment of bright design, electrical management chip package 300 can be half for managing wireless power transfer operation Conductor chip encapsulation.
Rectification circuit 301 can receive exchange (AC) voltage Vac.AC voltage Vac can be from for sending wireless power Transmitter provides.In the exemplary embodiment of present inventive concept, AC voltage Vac can be sent out by the resonance of inductance element It send.Rectification circuit 301 can be with rectified ac voltage Vac to generate rectified voltage Vrect.
DC-DC converter circuit 302 can receive rectified voltage Vrect as input voltage vin (with reference to Fig. 1's Vin).DC-DC conversion circuit 302 can export output voltage Vout and output electric current Iout.In the exemplary of present inventive concept In embodiment, DC-DC conversion circuit 302 may include electric pressure converter 320, output voltage regulator 330, voltage limitator 340, current sensor 350 and drive signal generator 360.
Electric pressure converter 320, output voltage regulator 330, voltage limitator 340, current sensor 350 and driving signal The structure and function of generator 3600 can be analogous respectively to electric pressure converter 120, the output voltage described referring to figs. 1 to Fig. 9 The structure and function of adjuster 130, voltage limitator 140, current sensor 150 and drive signal generator 160, and therefore Its repeated description can be omitted.
It is corresponding with first control signal CS1 when voltage limitator 340 is included in DC-DC conversion circuit 302 The voltage value of voltage can be restricted to be lower than threshold value.Voltage limitator 340 is described by reference to Fig. 9 to Figure 11.Therefore, defeated Electric current Iout can be exported steadily out.
Control circuit 303 can control the operation of rectification circuit 301 and DC-DC conversion circuit 302.For example, control circuit 303 can be micro controller unit (MCU).
In the exemplary embodiment of inventive concept, threshold value can be adjusted opposite with first control signal CS1 to limit The voltage answered.In order to adjust threshold value, the adjustable limitation reference voltage used by voltage limitator 340 of control circuit 303 Vlim (refers to Fig. 9).Thus, it is possible to obtain stable output electric current Iout.
In the exemplary embodiment of present inventive concept, control circuit 303 is adjustable to be used to adjust for output voltage The voltage value of the adjusting reference voltage of Vout.Thus, it is possible to obtain the output voltage Vout with desired voltage values.Control circuit 303 can also control any other group of rectification circuit 301, DC-DC conversion circuit 302 and electrical management chip package 300 The integrated operation of part.
Figure 16 is the block diagram for showing the electrical management chip package 400 for the exemplary embodiment conceived according to the present invention.Ginseng Figure 16 is examined, electrical management chip package 400 may include rectification circuit 401, DC-DC conversion circuit 402,403 and of control circuit Input current estimating circuit 470.However, other than electrical management chip package 400 may include the component shown in Figure 16 Other components.In the exemplary embodiment of present inventive concept, electrical management chip package 400 be can be for managing radio The semiconductor chip packaging of power transfer operation.
Rectification circuit 401, control circuit 403, electric pressure converter 420, output voltage regulator 430, voltage limitator 440, the structure and function of current sensor 450 and drive signal generator 460 can be analogous respectively to reference to Figure 15 description Rectification circuit 301, control circuit 303, electric pressure converter 320, output voltage regulator 330, voltage limitator 340, electric current sense The structure and function of device 350 and drive signal generator 360 is surveyed, and therefore its repeated description can be omitted.
Input current estimating circuit 470 can estimate the intensity of input current Iin.Input current Iin can be based on through whole The voltage Vrect of stream is generated.As described with reference to Fig. 3, adjust electric current Irg may include current value therebetween increased first when Between the second current component of the second time interval for reducing therebetween of the first current component for being spaced and current value.In structure of the present invention In the exemplary embodiment of think of, input current estimating circuit 470 can by using include adjust electric current Irg in first electricity Flow component estimates the intensity of input current Iin.
In the exemplary embodiment of present inventive concept, driving signal DS is can be used in input current estimating circuit 470 Estimate the intensity of input current Iin.This will be more fully described with reference to Figure 17.In the exemplary embodiment of present inventive concept, Estimation signal ES can be generated in input current estimating circuit 470, corresponds to estimated result.Estimate the intensity of input current Iin Method be described by reference to Figure 14.
In Figure 16, input current estimating circuit 470 and DC-DC provides conversion circuit 402 and is provided separately, but of the invention Conceive without being limited thereto.For example, input current estimating circuit 470 and DC-DC conversion circuit 402 can be by single components come real It is existing.In this case, when input current estimating circuit 470 is included in DC-DC conversion circuit 402, input current is estimated Meter circuit 470 can be realized together with current sensor 450, or can be provided separately with current sensor 450.It will be understood that , electrical management chip package 400 can only include the function for estimating the intensity of input current Iin.
The intensity of the exemplary embodiment conceived according to the present invention, input current Iin can relatively precisely estimate, rather than Directly measure the intensity of input current Iin.Specifically, the intensity of input current Iin can be in 400 quilt of electrical management chip package By real-time monitoring while operation.The exemplary embodiment conceived according to the present invention can be controlled accurately including electrical management core Chip, equipment or the system of piece encapsulation 400.
Figure 17 is to show input current estimating circuit shown in the Figure 16 for the exemplary embodiment conceived according to the present invention 470 figure.With reference to Figure 17, input current estimating circuit 470a may include current component extractor 471 and estimate signal Device 473.In the exemplary embodiment of present inventive concept, input current estimating circuit 470 shown in Figure 16 may include figure Input current estimating circuit 470a shown in 17.
Current component extractor 471, which can receive, adjusts electric current Irg.In the exemplary embodiment of present inventive concept, electricity Flow component extractor 471 can also receive driving signal DS.In the exemplary embodiment of present inventive concept, current component is extracted Device 471 may include first switch SW1 and second switch SW2.
In this case, first switch SW1 can be in response to including the first driving signal DS1 in driving signal DS And it operates.For example, the first transistor TR1 (referring to Fig. 2) when drive signal generator 460 (referring to Figure 16) passes through the first driving When signal DS1 is connected, first switch SW1 can be connected by the first driving signal DS1.On the other hand, when driving signal occurs When the first transistor TR1 of device 460 is ended by the first driving signal DS1, first switch SW1 can pass through the first driving signal DS1 is disconnected.In other words, the operation of first switch SW1 can correspond to the operation of the first transistor TR1.In addition, second switch SW2 can be operated in response to including the second driving signal DS2 in driving signal DS.The operation of second switch SW2 can be with The operation of second transistor TR2 (referring to Fig. 2) corresponding to drive signal generator 460.In this case, first switch SW1 and second switch SW2 is in turn switched on respectively responsive to the first driving signal DS1 and the second driving signal DS2.
When first switch SW1 connect and also second switch SW2 disconnect when, current component extractor 471 can export including Adjusting in electric current Irg, current value increased first the first current component being spaced therebetween.On the other hand, when first opens When closing SW1 disconnection and second switch SW2 connection, current component extractor 471 can not export electric current.In other words, including It can not be exported in the second current component for adjusting the second interval in electric current Irg, that current value reduces therebetween.Therefore, Current component extractor 471 can be extracted including adjusting the first current component in electric current Irg.
In short, current component extractor 471 can export extracted current component Iext (example according to driving signal DS Such as, the first current component).As with reference to described in Figure 13 and Figure 14, input current Iin (referring to Figure 16) influences current value at it Between increased first time interval the first current component.Therefore, extracted current component Iext can be used to estimate defeated Enter the intensity of electric current Iin.
Estimation signal generator 473 can receive extracted current component Iext.Estimate that signal generator 473 can be with base Signal ES is estimated in extracted current component Iext to generate.In the exemplary embodiment of present inventive concept, signal is estimated Generator 473 may include filter resistor Rf and filter condenser Cf.In this case, extracted current component Iext Average level component can be selected by filter resistors Rf and filter condenser Cf.As a result, estimation signal ES can be with Including information corresponding with the mean intensity of the estimation of input current Iin.Therefore, the intensity of input current Iin can refer to Signal ES is estimated to estimate.
In Figure 17, switch, resistor and capacitor are included in input current estimating circuit 470a.However, this hair Bright design is without being limited thereto.For example, first switch SW1, second switch SW2, filter resistor Rf and filter condenser Cf can benefits It is replaced with having with any other element of the function of switch, resistor and capacitor and characteristic.
Figure 18 is the exemplary embodiment conceived according to the present invention for describing to estimate using input current shown in Figure 17 Meter circuit 470a estimates the figure of the process of the intensity (with reference to Figure 16) of input current Iin.
In the time interval (example that first switch SW1 (referring to Figure 17) is connected and second switch SW2 (referring to Figure 17) is disconnected Such as, the interval from 0 to t1, from t2 to t3 and from t4 to t5) during, current component extractor 471 (referring to Figure 17) can be from tune Current Irg (referring to Figure 17) extracts increased first current component of current value.On the other hand, first switch SW1 disconnect and And time interval (for example, interval from t1 to t2, from t3 to t4 and from t5 to the t6) period that second switch SW2 is connected, electric current Component extractor 471 can not extract current component.Therefore, extracted current component Iext can have shown in Figure 18 Waveform.
Estimation signal generator 473 (referring to Figure 17) can choose the average level point of extracted current component Iext Amount.Estimation signal generator 473 can generate estimation signal ES based on selected average level component.In other words, estimate Meter signal ES may include information corresponding with the mean intensity of estimation of input current Iin (with reference to Figure 16).
However, extracted current component Iext can not include corresponding with the time interval of second switch SW2 connection Current component.Therefore, the intensity of the average level component selected by estimation signal generator 473 can be less than actual average Intensity.In other words, because the information for including in the estimation signal ES of Figure 17 may be inaccurate, by estimation signal generator The intensity of the average level component of 473 selections can be scaled (scale).
Figure 19 is to show input current estimating circuit shown in the Figure 16 for the exemplary embodiment conceived according to the present invention 470 figure.With reference to Figure 19, input current estimating circuit 470b may include current component extractor 471, estimation signal generator 473 and scaler 475.In the exemplary embodiment of present inventive concept, input current estimating circuit Figure 47 0 of Figure 16 be can wrap Include input current estimating circuit 470b shown in Figure 19.
Current component extractor 471 and estimation signal generator 473 can be similar to those shown in Figure 17 and Figure 18, And therefore, repeated description can be omitted.
The amplitude of the mean intensity of the estimation of the adjustable input current Iin of scaler 475 (referring to Figure 16).Such as with reference to figure Described in 18, the reality that the intensity of the average level component selected by estimation signal generator 473 can be less than input current Iin is put down Equal intensity.Therefore, scaler 475 can be used for obtaining corresponding with the mean intensity of the estimation of input current Iin more accurate Information.The amplitude of the mean intensity of the estimation of the amount and input current Iin that are scaled by scaler 475 can change.
Figure 20 is the exemplary embodiment conceived according to the present invention for describing to estimate using input current shown in Figure 19 Meter circuit 470b estimates the figure of the process of the intensity of input current Iin (with reference to Figure 16).Element shown in Figure 20 corresponds to Element shown in Figure 18, and therefore can no longer describe.
The amplitude of the mean intensity of the estimation of scaler 475 (referring to Figure 19) adjustable input current Iin.In other words It says, can be adjusted by the amplitude of the average level component of estimation signal generator 473 (referring to Figure 19) selection.It therefore, can be with The intensity for obtaining estimation, is similar to the actual mean intensity of input current Iin.In addition, estimation signal ES may include more Accurate information.
It will be understood that present inventive concept and be confined to input current estimating circuit 470a describe with reference to Figure 17 to Figure 20 with The configuration and function of 470b.For example, input current estimating circuit 470 (referring to Figure 16) can be configured as and be different from reference to Figure 17 Input current the estimating circuit 470a and 470b described with Figure 19, and input current Iin can be by extremely scheming with reference Figure 17 Different other processes of process of 20 descriptions are estimated.
Figure 21 is the electric power biography including DC-DC conversion circuit 1130 for showing the exemplary embodiment conceived according to the present invention Send the block diagram of the receiver Rx of system 1000.With reference to Figure 21, the receiver Rx of power transmission system 1000 may include power pipe Manage chip package 1100, battery 1155 and radio frequency (RF)/digital circuit block 1199.Electrical management chip package 1100 may include Rectification circuit 1110, DC-DC conversion circuit 1130, high voltage linear adjuster 1150 and low voltage difference (low-dropout, LDO) Adjuster 1170 and MCU 1190.In the exemplary embodiment of present inventive concept, power transmission system 1000 can be abided by Wireless power transfer operation is operated.In the exemplary embodiment of present inventive concept, power transmission system 1000 can be with It is the wireless charging system using the resonance of inductance element.
Rectification circuit 1110 can receive AC voltage Vac.AC voltage Vac can be from the transmitter of power transmission system 1000 Tx is provided.Rectification circuit 1110 can be with rectified ac voltage Vac to generate rectified voltage Vrect.
DC-DC conversion circuit 1130 can receive rectified voltage Vrect.DC-DC conversion circuit 1130 can export Output voltage Vout and output electric current Iout.DC-DC conversion circuit 1130 can be the exemplary implementation conceived according to the present invention One in the DC-DC converter circuit of example.In this case, DC-DC conversion circuit 1130 may include voltage limitator (140, referring to Fig. 1) are used to limit voltage corresponding with signal is controlled.In addition, in this case, DC-DC conversion electricity Road 1130 may include input current estimator (270, referring to Figure 13), be used to estimate the intensity of input current.
When in the DC-DC converter circuit that DC-DC conversion circuit 1130 is the exemplary embodiment conceived according to the present invention One when, DC-DC conversion circuit 1130 can perform various functions.Therefore, DC-DC conversion circuit 1130 can be mentioned individually For not needing additional conversion circuit (for example, charger circuit for charging to battery 1155).In the example of present inventive concept Property embodiment in, battery 1155 can be by using the output voltage Vout that exports from DC-DC conversion circuit 1130 and output electricity Stream Iout charges.In this case, individual charger circuit is not used.In addition, DC-DC conversion circuit 1130 can be with Generate and/or provide the voltage and current used in other chips, equipment or system.
High voltage linear adjuster 1150 can receive rectified voltage Vrect.High voltage linear adjuster 1150 can To generate the first operation voltage VOP1 for operating DC-DC conversion circuit 1130 based on rectified voltage Vrect.In addition, High voltage linear adjuster 1150 can generate second for operating ldo regulator 1170 based on rectified voltage Vrect Operate voltage VOP2.
Electrical management chip package 1100 does not receive electric power from battery 1155.It is, therefore, possible to provide for operating power pipe Manage the power circuit of chip package 1100.High voltage linear adjuster 1150 can be served as operating electrical management chip package 1100 power circuit.Particularly, high voltage linear adjuster 1150 can be by the rectified voltage Vrect with ripple quantity It is converted into the first operation voltage VOP1 and the second operation voltage VOP2 with opposite stationary value.
Ldo regulator 1170 can be by using the second operation voltage VOP2 generated by high voltage linear adjuster 1150 To operate.The voltage used in other circuits, chip, equipment or system can be generated in ldo regulator 1170.Particularly, LDO Adjuster 1170 can be based on the second operation voltage VOP2 output voltage drop Vdrp.The voltage drop exported from ldo regulator 1170 Vdrp can be provided to RF/ digital circuit block 1199.
MCU 1190 can control the whole operation including the component in electrical management chip package 1100.In the present invention In the exemplary embodiment of design, MCU 1190 is adjustable for limiting the threshold value of voltage corresponding with signal is controlled.? In the exemplary embodiment of present inventive concept, the adjustable adjusting for being used to adjust for output voltage Vout of MCU 1190 is with reference to electricity The voltage value of pressure.
RF/ digital circuit block 1199 can be operated by using voltage drop Vdrp.RF/ digital circuit block 1199 can be sent out Send voltage control signal V_CON to the transmitter Tx of electric power supply system 1000.Voltage control signal V_CON will be with reference to Figure 22 more It describes in detail.
Figure 22 is the power transmission system including DC-DC conversion circuit for showing the exemplary embodiment conceived according to the present invention The block diagram of the transmitter Tx and receiver Rx of system 1000.With reference to Figure 22, the transmitter Tx of power transmission system 1000 may include Buck converter (buck converter) 1310, RF circuit 1330, MCU 1350 and transmission inductor LTx.Shown in Figure 22 The receiver Rx of power transmission system 1000 only include rectification circuit 1110 and RF/ digital circuit block 1199.However, electric power passes Each of the transmitter Tx and receiver Rx for sending system 1000 can also include the component shown in Figure 22 other than its His component.As the power transmission system 1000 of Figure 21, the power transmission system 1000 of Figure 22 be can be using inductance element Resonance wireless charging system.
Buck converter 1310, which can deliver power to, sends inductor LTx.Rectification circuit 1110 can pass through transmission Resonance between inductor LTx and the inductance element of rectification circuit 1110 receives AC voltage Vac.Power transmission system 1000 Receiver Rx can be operated by using via the AC voltage Vac that inductor LTx is provided is sent.
RF/ digital circuit block 1199 can be operated by using voltage drop Vdrp.RF/ digital circuit block 1199 can be sent out Send the RF circuit 1330 of voltage control signal V_CON to transmitter Tx.In the exemplary embodiment of present inventive concept, RF/ number Word circuit block 1199 can abide by wireless communication protocol, such as, but not limited to, bluetooth, near-field communication (NFC) etc., with RF circuit 1330 communications.
Voltage control signal V_CON is the amplitude for being used to the AC voltage Vac that control is provided to rectification circuit 1110 Signal.In the exemplary embodiment of present inventive concept, voltage control signal V_CON may include and the DC- from receiver Rx Output electric current Iout (referring to Figure 21) the associated information of intensity of DC conversion circuit 1130 (refer to Figure 21) output and with by The associated information of intensity for the input current that DC-DC conversion circuit 1130 is estimated.It is provided to power transmission system 1000 The electric signal for the component for including in receiver Rx can be by based on including that information in voltage control signal V_CON controls AC The amplitude of voltage Vac is managed.
Voltage control signal V_CON can be supplied to MCU 1350 by RF circuit 1330.MCU1350 can be based on voltage Signal V_CON is controlled to control buck converter 1310.Buck converter 1310 can be adjusted according to the control of MCU 1350 Power to be communicated to transmission inductor LTx.In this way, the amplitude for being provided to the AC voltage Vac of rectification circuit 1110 can be with It is controlled.Rectification circuit 1110 can be with rectified ac voltage Vac to generate rectified voltage Vrect.
Figure 23 be show the exemplary embodiment conceived according to the present invention include Figure 22 shown in power transmission system The block diagram of the electric power management system 2000 of 1000 mobile electronic device.With reference to Figure 23, electric power management system 2000 may include Battery 2100, main electrical management integrated circuit (PMIC) 2300, processor 2500, input/output interface 2510, memory 2520, storage device 2530, display 2540 and telecommunication circuit block 2550.In the exemplary embodiment of present inventive concept, packet The mobile electronic device for including electric power management system 2000 can be mobile phone, plate, wearable device etc..In such case Under, processor 2500 may include application processor.
In the exemplary embodiment of present inventive concept, battery 2100 can be by using output voltage Vout (with reference to figure 21) it charges with output electric current Iout (referring to Figure 21).When being connected to mobile electronic device after charging, battery 2100 Cell voltage Vbat can be exported.Cell voltage Vbat can be provided to main PMIC 2300.Main PMIC 2300 can will be from The cell voltage Vbat that battery 2100 provides is converted into stable voltage.Stable voltage can be supplied to by main PMIC 2300 Other assemblies.Processor 2500, input/output interface 2510, memory 2520, storage device 2530, display 2540 and logical Each of letter circuit block 2550 can be operated by using the stable voltage provided from main PMIC 2300.
It is appreciated that electric power management system 2000 and mobile electronic device including electric power management system 2000 can be into one Step include the component shown in Figure 23 other than other assemblies.For example, electric power management system 2000 and including electrical management system The mobile electronic device of system 2000 can not include at least one of component shown in Figure 23.
Figure 24 be show the exemplary embodiment conceived according to the present invention include wireless power transmit manager (WPT PM) the block diagram of 3810 mobile device 3000.With reference to Figure 24, mobile device 3000 may include image processing block 3100, wireless Communication block 3200, audio processing block 3300, nonvolatile memory 3400, Synchronous Dynamic Random Access Memory (SDRAM) 3500, user interface 3600, primary processor 3700 and electrical management block 3800.In the exemplary embodiment of present inventive concept, Mobile device 3000 can be mobile terminal, personal digital assistant (PDA), personal media player (PMP), digital camera, intelligence It can phone or plate.
Image processing block 3100 can receive light by lens 3110.Including the image sensing in image processing block 3100 Device 3120 and image-signal processor 3130 can be by using the photogenerated one or more images received.
Wirelessly communicating block 3200 may include antenna 3210, transceiver 3220 and modem 3230.Wirelessly communicate block 3200 can abide by various wireless communication protocols, and such as long term evolution (LTE), worldwide interoperability for microwave accesses (WiMax), the whole world are moved Dynamic communication system (GSM), CDMA (CDMA), bluetooth, NFC, WiFi, radio frequency identification (RFID) etc., with mobile device 3000 Outside communicated.
Audio processing block 3300 can be by using audio signal processor 3310, microphone 3320 and loudspeaker 3330 Handle audio signal.Nonvolatile memory 3400 can store the data to be retained, for example, even if working as mobile device 3000 When not being powered.In the exemplary embodiment of present inventive concept, nonvolatile memory 3400 can be NAND type flash memory Reservoir, phase transformation RAM (PRAM), magnetic resistance RAM (MRAM), resistance RAM (ReRAM), ferroelectric RAM (FRAM), NOR type flash memory Etc..Alternatively, nonvolatile memory 3400 may include different types of memory.SDRAM 3500 can be deposited temporarily Store up the data used in the operation of mobile device 3000.SDRAM 3500 may be operative to the work storage of mobile device 3000 Device, operation memory and buffer storage.
User interface 3600 can operate between user and mobile device 3000 according to the control of primary processor 3700 Interface.For example, user interface 3600 may include input interface, for example, keyboard, keypad, button, touch panel, touch screen, Touch pads, touch ball, camera, microphone, gyroscope sensor, Vibration Sensor etc..User interface 3600 can also include Output interface, such as liquid crystal display (LCD), Organic Light Emitting Diode (OLED) display, Activematric OLED (AMOLED) Display, LED etc..
Primary processor 3700 can control the overall operation of mobile device 3000.Image processing block 3100, wireless communication block 3200, audio processing block 3300, nonvolatile memory 3400, SDRAM 3500 and electrical management block 3800 can be according to main places The control of device 3700 is managed, executes and operation passes through the user instruction that user interface 3600 provides.Alternatively, image processing block 3100, block 3200, audio processing block 3300, nonvolatile memory 3400, SDRAM 3500 and electrical management block are wirelessly communicated 3800 can provide a user various information by user interface 3600 according to the control of primary processor 3700.Primary processor 3700 can pass through system on chip (SoC) Lai Shixian.In the exemplary embodiment of present inventive concept, primary processor 3700 can be with Including application processor.
Electrical management block 3800 can manage the electric power of the operation for mobile device 3000.Electrical management block 3800 can be with Manager 3810 and main power manager (main PM) 3820 are transmitted including wireless power.Wireless power transmits manager 3810 can be with The exemplary embodiment conceived according to the present invention is realized.For example, wireless power transmission manager 3810 may include for limiting Make the voltage limitator 340 (referring to Figure 15) of voltage corresponding with control signal.In the exemplary embodiment of present inventive concept In, wireless power transmission manager 3810 may include the input current estimating circuit 470 for estimating the intensity of input current (referring to Figure 16).In the exemplary embodiment of present inventive concept, main power manager 3820 can be main 2300 (ginseng of PMIC Examine Figure 23).
Figure 25 is the electronic equipment including electrical management block 4600 for showing the exemplary embodiment conceived according to the present invention 4000 block diagram.With reference to Figure 25, electronic equipment 4000 may include processor 4100, memory 4200, storage device 4300, lead to Believe circuit block 4400, user interface 4500 and electrical management block 4600.In the exemplary embodiment of present inventive concept, electronics is set Standby 4000 can be computer, plate, wearable device etc..
Processor 4100 can control the overall operation of electronic equipment 4000.In the exemplary embodiment of present inventive concept In, processor 4100 may include application processor.Alternatively, processor 4100 can be general processor or for work The processor stood.
Memory 4200 can be temporarily stored in data used in the operation of electronic equipment 4000.Memory 4200 can be with Data are exchanged with processor 4100.Memory 4200 may be operative to the working storage of electronic equipment 4000, operation memory And buffer storage.In the exemplary embodiment conceived according to the present invention, memory 4200 may include volatile memory, Such as, but not limited to, static RAM (SRAM), dynamic ram (DRAM) and SDRAM or nonvolatile memory, it is such as but unlimited In PRAM, MRAM, ReRAM and FRAM.Memory 4200 may include that one or more memory modules or one or more are deposited Reservoir encapsulation.
Storage device 4300 can store the data to be retained, for example, even if when electronic equipment 4000 is not powered. In the exemplary embodiment of present inventive concept, storage device 4300 may include nonvolatile memory, such as, but not limited to, Flash memory, PRAM, MRAM, ReRAM and FRAM.In the exemplary embodiment of present inventive concept, storage device 4300 can To be storage card, such as, but not limited to, embedded multi-media card (eMMC).
Telecommunication circuit block 4400 can be according to the control of processor 4100 and the PERCOM peripheral communication of electronic equipment 4000.Communication electricity Road block 4400 can abide by wired or wireless communication agreement and external device communication.For example, telecommunication circuit block 4400 can be based on Wireless communication protocol (such as, but not limited to, LTE, WiMax, GSM, CDMA, bluetooth, NFC, WiFi and RFID) and wire communication association (such as, but not limited to, universal serial bus (USB), small computer system interface (SCSI), peripheral component interconnection are quick for view (PCIe), advanced technology attachment (ATA), serial ATA (SATA), Parallel ATA (PATA), Serial Attached SCSI (SAS) (SAS), integrated drive Dynamic device electronic equipment (IDE) and firewire) at least one of and external device communication.
User interface 4500 can operate connecing between user and electronic equipment 4000 according to the control of processor 4100 Mouthful.User interface 4500 may include input interface, such as, but not limited to, keyboard, keypad, button, touch panel, touch Screen, touch tablet, touch ball, camera, microphone, gyroscope sensor, Vibration Sensor etc..User interface 4500 can also wrap Output interface is included, such as, but not limited to, LCD, OLED show that equipment, AMOLED show equipment, LED, loudspeaker, motor etc..
Electrical management block 4600 can manage the electric power of the operation for electronic equipment 4000.Electrical management block 4600 can be with The exemplary embodiment conceived according to the present invention is realized.In the exemplary embodiment of present inventive concept, electrical management block 4600 may include for limiting the voltage limitator 340 of voltage corresponding with signal is controlled (with reference to Figure 15).In the present invention In the exemplary embodiment of design, electrical management block 4600 may include that the input current for estimating the intensity of input current is estimated Count circuit 470 (referring to Figure 16).Electrical management block 4600 can also include main PMIC 2300 (referring to Figure 23).
Processor, memory and the circuit for the exemplary embodiment conceived according to the present invention can be according to a variety of different envelopes Any encapsulation technology in dress technology is packed, the encapsulation technology such as, but not limited to, laminate packaging (PoP), ball bar battle array Arrange (BGA), chip-scale package (CSP), the carrying encapsulation of plastics formula leaded chip (PLCC), plastics dual-inline package (PDIP), die package (Die inWaffle Pack) in chip packet, wafer format die package (Die in Wafer Form), chip on board technology (COB), ceramic dual in-line package (CERDIP), plastics metric system quad flat package (MQFP), slim quad flat package (TQFP), small outline packages (SOIC), diminution outline packages (SSOP), thin-type small-size Encapsulate (TSOP), slim quad flat package (TQFP), single in-line packages (SIP), multi-chip package (MCP), wafer scale Manufacture encapsulation (WFP), the storehouse encapsulation (WSP) of wafer-level process etc..
Figure 26 is that show that the exemplary embodiment conceived according to the present invention realizes includes user 5100 and electronic equipment The figure of 5300 to 5304 " Internet of Things (IoT) " system 5000.
Each of electronic equipment 5300 to 5304 can be computer, mobile terminal, PDA, PMP, digital camera, intelligence Energy phone, plate, wearable device etc..What each of electronic equipment 5300 to 5304 can be conceived according to the present invention shows Example property embodiment is realized.Each of electronic equipment 5300 to 5304 may include being carried out according to wireless power transfer operation The power transmission system 1000 (referring to Figure 21 and Figure 22) of operation.In other words, each of electronic equipment 5300 to 5304 It may include the wireless charging system using the resonance of inductance element.
In the exemplary embodiment of present inventive concept, included electricity in each of electronic equipment 5300 to 5304 Power management chip encapsulating device 300 (referring to Figure 15) may include limiting for limiting the voltage of voltage corresponding with signal is controlled Device 340 (referring to Figure 15) processed.In the exemplary embodiment of present inventive concept, in each of electronic equipment 5300 to 5304 Included electrical management chip package 400 (referring to Figure 16) may include the input current for estimating the intensity of input current Estimating circuit 470 (refers to Figure 16).
Each of electronic equipment 5300 to 5304 can exchange information with user 5100.Electronic equipment 5300 to 5304 Each of can exchange information with one another.User 5100 and electronic equipment 5300 to 5304 can be handed over each other by " internet " Change information.
Each device structure shown in figure is used to help to understand present inventive concept.For example, each piece can be according to concept It is formed by smaller piece.Alternatively, bigger block can be formed according to function for multiple pieces.In other words, present inventive concept is simultaneously It is not limited to each component shown in figure.
Although the exemplary embodiment by reference to present inventive concept describes present inventive concept, to art technology Personnel are it is readily apparent that can be made various changes and modifications without departing from of the invention defined by the appended claims The spirit and scope of design.

Claims (25)

1. a kind of DC-DC conversion circuit, comprising:
Electric pressure converter is configured as receiving input voltage, generates in response to driving signal and adjusts electric current, and generates output electricity Pressure and output electric current, the output electric current are generated based on adjusting electric current；
Output voltage regulator is configured as adjusting the output voltage, and passes through the first control of control output end output Signal；
Voltage limitator is configured as the voltage value of first control signal being limited to less than threshold value, when the control output end When the voltage of son is equal to or less than limitation reference voltage, the voltage value of the first control signal is equal to control output end Voltage voltage value；
Current sensor is configured as sensing the intensity for adjusting electric current, and generates the value having with the intensity sensed The second control signal of corresponding voltage value；And
Drive signal generator is configured as generating driving letter based on the first control signal and the second control signal Number, the first control signal has the voltage value lower than threshold value.
2. DC-DC conversion circuit as described in claim 1, wherein when the voltage value of the output voltage is equal to by described defeated Voltage regulator is adjusted out voltage value or when being greater than lowest critical value, the voltage value of the first control signal is equal to described The voltage value of the voltage of control output end, and
When the voltage value of the output voltage is lower than the voltage value adjusted by the output voltage regulator and faces less than minimum When dividing value, the voltage limitator is configured as the voltage value of the first control signal being limited to less than the threshold value.
3. DC-DC conversion circuit as described in claim 1, wherein the output voltage and the output electric current respectively correspond In the charging voltage and charging current that be used to charge for the battery not being completely charged.
4. DC-DC conversion circuit as claimed in claim 3, wherein be configured when the battery not being completely charged is connected to When node to export the output voltage, the voltage limitator is configured as limiting the voltage value of the first control signal It is made as lower than the threshold value.
5. DC-DC conversion circuit as described in claim 1, wherein the voltage limitator includes:
Operational amplifier comprising be configured as receiving the first input end of the limitation reference voltage, be configured as receiving Second input terminal of the voltage of control output end and be configured as output to the limitation reference voltage and the control The comparison output terminal for the result that the voltage of output terminal processed is compared；And
Diode, the anode of the diode is connected to second input terminal, and the cathode of the diode is connected It is connected to the relatively output terminal.
6. DC-DC conversion circuit as claimed in claim 5, wherein the voltage value of the limitation reference voltage is adjustable.
7. DC-DC conversion circuit as described in claim 1, wherein when the voltage of control output end is equal to or less than When the limitation reference voltage, the voltage value of the first control signal is not influenced by the voltage limitator, and
When the voltage of control output end is greater than the limitation reference voltage, the voltage limitator is configured as institute The voltage value for stating first control signal is limited to less than the threshold value.
8. a kind of DC-DC conversion circuit, comprising:
Electric pressure converter is configured as receiving input voltage, generates in response to driving signal and adjusts electric current, and output output electricity Pressure and output electric current, the electric current that adjusts includes current value the increased first the first current component and current value being spaced therebetween Second current component at the second interval reduced therebetween, the output electric current are generated based on adjusting electric current；
Output voltage regulator is configured as adjusting the output voltage, and generates the first control by control output end Signal；
Voltage limitator is configured as the voltage value of first control signal being limited to less than threshold value, when the control output end When the voltage of son is equal to or less than limitation reference voltage, the voltage value of the first control signal is equal to control output end Voltage voltage value；
Current sensor is configured as sensing the intensity for adjusting electric current, and generates the value having with the intensity sensed The second control signal of corresponding voltage value；
Input current estimator is configured as estimating input current by using first current component at first interval Intensity, the input current are generated based on the input voltage；And
Drive signal generator is configured as generating driving letter based on the first control signal and the second control signal Number, the first control signal has the voltage value lower than threshold value.
9. DC-DC conversion circuit as claimed in claim 8, wherein the electric pressure converter includes:
The first transistor comprising it is connected to the first terminal for being configured as receiving the node of the input voltage, described first Transistor is configured as controlling by including the first driving signal in the driving signal；
Second transistor is connected between the Second terminal and ground nodes of the first transistor, and is configured as leading to It crosses including the second driving signal in the driving signal and controls；
Inductance element, the first terminal of the inductance element are connected to the Second terminal of the first transistor；And
Capacity cell is connected between the node for being configured as exporting the output voltage and the ground nodes.
10. DC-DC conversion circuit as claimed in claim 9, wherein the first transistor and second transistor difference It is successively switched in response to first driving signal and second driving signal.
11. DC-DC conversion circuit as claimed in claim 9, wherein the adjusting electric current is the electricity for flowing through the inductance element Stream.
12. DC-DC conversion circuit as claimed in claim 8, wherein when the voltage of control output end is equal to or less than When the limitation reference voltage, the voltage value of the first control signal is not influenced by the voltage limitator, and
When the voltage of control output end is greater than the limitation reference voltage, the voltage limitator is configured as institute The voltage value for stating first control signal is limited to less than the threshold value.
13. a kind of electrical management chip package, comprising:
Rectification circuit is configured as rectification exchange (AC) voltage to generate rectified voltage；
DC-DC conversion circuit is configured as receiving rectified voltage, and exports output voltage and output electric current；And
Control circuit is configured as controlling the operation of the rectification circuit and the DC-DC conversion circuit,
Wherein, the DC-DC conversion circuit includes:
Electric pressure converter is configured as receiving rectified voltage, generates in response to driving signal and adjusts electric current, and generates institute Output voltage and the output electric current are stated, the output electric current is generated based on adjusting electric current；
Output voltage regulator is configured as adjusting the output voltage, and passes through the first control of control output end output Signal；
Voltage limitator is configured as the voltage value of first control signal being limited to less than threshold value, when the control output end When the voltage of son is equal to or less than limitation reference voltage, the voltage value of the first control signal is equal to control output end Voltage voltage value；
Current sensor is configured as sensing the intensity for adjusting electric current, and generates the value having with the intensity sensed The second control signal of corresponding voltage value；And
Drive signal generator is configured as generating driving letter based on the first control signal and the second control signal Number, the first control signal has the voltage value lower than threshold value.
14. electrical management chip package as claimed in claim 13, wherein when the voltage value of the output voltage is equal to by institute When stating the voltage value of output voltage regulator adjusting or being greater than lowest critical value, the voltage value of the first control signal is equal to The voltage value of the voltage of control output end, and
When the voltage value of the output voltage is lower than the voltage value adjusted by the output voltage regulator and faces less than minimum When dividing value, the voltage limitator is configured as the voltage value of the first control signal being limited to less than the threshold value.
15. electrical management chip package as claimed in claim 13, wherein be equal to when the voltage of control output end or When less than the limitation reference voltage, the voltage value of the first control signal is not influenced by the voltage limitator, and
When the voltage of control output end is greater than the limitation reference voltage, the voltage limitator is configured as institute The voltage value for stating first control signal is limited to less than the threshold value.
16. electrical management chip package as claimed in claim 15, wherein the control circuit is configured as adjusting the limit The voltage value of reference voltage processed.
17. electrical management chip package as claimed in claim 13, wherein the control circuit is configured as adjustment and is used for Adjust the voltage value of the adjusting reference voltage of the output voltage.
18. electrical management chip package as claimed in claim 13, wherein the adjusting electric current includes that current value increases therebetween Second current component at the second interval that first current component and current value at the first interval added reduce therebetween, and
The wherein electrical management chip package further include:
Input current estimating circuit is configured as estimating input electricity by using first current component at first interval The intensity of stream, the input current are generated based on the rectified voltage.
19. electrical management chip package as claimed in claim 18, wherein the input current estimating circuit includes:
Current component extractor is configured to respond to the driving signal from the first interval described in the adjusting current draw The first current component；And
Estimate signal generator, is configured as generating estimation signal, the estimation based on extracted first current component Signal includes information corresponding with the mean intensity of the estimation of the input current.
20. electrical management chip package as claimed in claim 19, wherein the input current estimating circuit further include:
Scaler is configured as adjusting the amplitude of the mean intensity of the estimation of the input current.
21. a kind of DC-DC conversion circuit, comprising:
Electric pressure converter is configured to respond to driving signal and generates adjusting electric current, and output output voltage and output electric current；
Output voltage regulator is configured as generating the first control letter in response to the output voltage by control output end Number；
Voltage limitator is configured as the voltage value of first control signal being maintained below threshold value, when the control output end When the voltage of son is equal to or less than limitation reference voltage, the voltage value of the first control signal is equal to control output end Voltage voltage value；
Current sensor is configured to respond to the adjusting electric current and generates second control signal；And
Drive signal generator, is configured to respond to the first control signal and the second control signal generates driving letter Number.
22. DC-DC conversion circuit as claimed in claim 21, wherein the voltage limitator is connected to the output voltage The output of adjuster and the input of the drive signal generator.
23. DC-DC conversion circuit as claimed in claim 21, wherein the voltage limitator includes operational amplifier, described Operational amplifier has the first input end for being configured as receiving the first reference voltage and is configured as receiving first control Second input terminal of signal processed.
24. DC-DC conversion circuit as claimed in claim 23, wherein when the voltage value of the first control signal is greater than institute When stating the voltage value of the first reference voltage, the voltage value of the first control signal is lower than the threshold value.
25. DC-DC conversion circuit as claimed in claim 23, wherein the voltage limitator includes diode, two pole Manage the cathode with the output terminal for being connected to the operational amplifier and the second input terminal for being connected to the operational amplifier The anode of son.
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CN105322790A (en) 2016-02-10

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